Merge branch 'sh/stable-updates' into sh/for-2.6.30

1 files changed, 59 insertions, 0 deletions

diff --git a/arch/m32r/include/asm/mmzone.h b/arch/m32r/include/asm/mmzone.h
new file mode 100644
index 00000000000..9f3b5accda8
--- /dev/null
+++ b/arch/m32r/include/asm/mmzone.h
@@ -0,0 +1,59 @@
+/*
+ * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
+ *
+ */
+
+#ifndef _ASM_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#include <asm/smp.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid)		(node_data[nid])
+
+#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)
+#define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid)						\
+({									\
+	pg_data_t *__pgdat = NODE_DATA(nid);				\
+	__pgdat->node_start_pfn + __pgdat->node_spanned_pages - 1;	\
+})
+
+#define pmd_page(pmd)		(pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+/*
+ * pfn_valid should be made as fast as possible, and the current definition
+ * is valid for machines that are NUMA, but still contiguous, which is what
+ * is currently supported. A more generalised, but slower definition would
+ * be something like this - mbligh:
+ * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
+ */
+#if 1	/* M32R_FIXME */
+#define pfn_valid(pfn)	(1)
+#else
+#define pfn_valid(pfn)	((pfn) < num_physpages)
+#endif
+
+/*
+ * generic node memory support, the following assumptions apply:
+ */
+
+static __inline__ int pfn_to_nid(unsigned long pfn)
+{
+	int node;
+
+	for (node = 0 ; node < MAX_NUMNODES ; node++)
+		if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node))
+			break;
+
+	return node;
+}
+
+static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
+{
+	return(NODE_DATA(pfn_to_nid(pfn)));
+}
+
+#endif /* CONFIG_DISCONTIGMEM */
+#endif /* _ASM_MMZONE_H_ */